TI-2023-22281 Aliases CVE-2023-41889

Late-Unicode normalization vulnerability in SHIRASAGI

MEDIUM 63CWE-176Published 2023-09-15 · Updated 2024-09-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

SHIRASAGI is a Content Management System. Prior to version 1.18.0, SHIRASAGI is vulnerable to a Post-Unicode normalization issue. This happens when a logical validation or a security check is performed before a Unicode normalization. The Unicode character equivalent of a character would resurface after the normalization. The fix is initially performing the Unicode normalization and then strip for all whitespaces and then checking for a blank string. This issue has been fixed in version 1.18.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00706 53rd percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD

Fix Fixed shirasagi (shirasagi): 1.18.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
shirasagi	shirasagi	before 1.18.0	1.18.0	Patch available	CNA

shirasagi Vendorshirasagi Affected before 1.18.0 Fixed in 1.18.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ss-proj:shirasagi::::::::	before 1.18.0	Vulnerable	SHIRASAGI Project

cpe:2.3:a:ss-proj:shirasagi:*:*:*:*:*:*:*:* Versions before 1.18.0 Vulnerable ·SHIRASAGI Project

Remediation

Fix · CNA shirasagi (shirasagi) Fixed in 1.18.0

Timeline

2026-10-02 Threatist record created from CVE-2023-41889

References

Exploit 2

Other 1

https://github.com/shirasagi/shirasagi/blob/f249ce3f06f6bfbc0017b38f5c13de424334c3ea/app/models/concerns/rdf/object.rb#L68-L72

TI-2022-21269 Open redirect in SHIRASAGI CVSS 3.1MEDIUM 6.1
TI-2023-08683 Cross-site scripting in SHIRASAGI CVSS 3.1MEDIUM 5.4
TI-2022-21285 Cross-site scripting in SHIRASAGI CVSS 3.1MEDIUM 5.4
TI-2023-08684 Cross-site scripting in SHIRASAGI CVSS 3.1MEDIUM 4.8
TI-2023-20583 Path traversal in SHIRASAGI CVSS 3.1HIGH 8.8
TI-2024-31310 Path traversal in SHIRASAGI CVSS 3.1HIGH 7.5

See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences